I've installed 2.6.0-test8 on machine attached to HW raid, made 5.5TB partition (using LVM) and made XFS filesystem on this partition. This partittion was exported to cca 25 nodes. I started some stress tests (writing and reading files through NFS) from these nodes to this partition and went home.The other day I found out that syslog filled up /var/log/messages with backtraces (see below), and the XFS filesystem went just totally crappy (for example when I had some file on this partition, and did simple cp to another name, the content of the new file was corrupted (NFS was not involved in this)).